Digital Extensions - Mitel MX-ONE Installation Instruction

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NSTALLING OARDS AND
4.3
4.4
4.4.1
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ABLING
ANALOG EXTENSIONS ELU34
ELU34 is a 32 individuals analog extension line unit intended for normal analog tele-
phones, with functionality for both message waiting and call metering. A parallel tele-
phone, an extra bell or a FAX can be connected to an ELU34.
Note: ELU34 has to have individual 0 activated as the first individual and removed as
the last individual, or else the communications with the board will fail.
If done in the wrong order individuals will be blocked.
Note: An external primary protection circuit shall be used as an additional protection
when outdoor lines from other buildings are connected to the board. This protec-
tion circuit must have a striking voltage higher than 280 VDC.
Note: A remaining high voltage may remain on the board when the board is removed
from the subrack with the power still on, a so called "hotswap". Do not touch the
board component or solder points for a few minutes after the removal. To reduce
the high voltage to a safe level, leave the board un-plugged in the subrack for at
least 15 seconds.

DIGITAL EXTENSIONS

As an example, digital system telephones may have the type designations DBC 2XX
connected to ELU33.
Only one system telephone per line can be connected, no parallel telephone or extra
bell.
Note: The board must not have any open cable ends.
ELU33
Figure 23: Example with system telephone DBC 2xx, ELU33 - MDF (32 pairs)
The installation instructions 1/LZT 102 537 and 1/LZT 102 762 show how the wires are
connected to terminal block NEF 181 or RNV 114. Regarding connection of system
telephone DBC 2xx:
see the installation instructions for TELEPHONE SET DBC 220 01
see the installation instructions for TELEPHONE SETS DBC 222 01, DBC 223 01, DBC
224 01, DBC 225 01, KEY PANEL UNIT DBY 419 01 AND OPTION UNIT DBY 420 01.
21/1531-ASP11301 Uen C 2017-03-28